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 ###Instrução: Qual é o D 50 √ quando o D 47 √ é r 27 √?
 ###Tabelas: CREATE TABLE 1969_as_three_leagues_come_together (1969_as_three_leagues_come_together_id AUTO_INCREMENT PRIMARY KEY, Portland DFL VARCHAR, Wins INT, Byes INT, Losses INT, Draws INT, Against INT) CREATE TABLE senate_composition_as_a_result_of_the_elections (senate_composition_as_a_result_of_the_elections_id AUTO_INCREMENT PRIMARY KEY, D 50 √ VARCHAR, D 49 √ VARCHAR, D 48 √ VARCHAR, D 47 √ VARCHAR, D 46 √ VARCHAR, D 45 √ VARCHAR, D 44 √ VARCHAR, D 43 √ VARCHAR, D 42 √ VARCHAR, D 41 √ VARCHAR) CREATE TABLE magnetic_properties (magnetic_properties_id AUTO_INCREMENT PRIMARY KEY, Magnet VARCHAR, B r (T) VARCHAR, H ci (kA/m) VARCHAR, (BH) max (kJ/m 3 ) VARCHAR, T c (°C) VARCHAR) CREATE TABLE minesweepers (minesweepers_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Ships in class VARCHAR, Pennant Number INT, Builder VARCHAR, Commissioned VARCHAR) CREATE TABLE list_of_the_most_populous_us_counties_sorted_according_to_the_mid-2011_official_estimate_by_the_uscb (list_of_the_most_populous_us_counties_sorted_according_to_the_mid-2011_official_estimate_by_the_uscb_id AUTO_INCREMENT PRIMARY KEY, Rank INT, County VARCHAR, State VARCHAR, Land area (km²) VARCHAR, Land area (mi²) VARCHAR, April 1, 2010 census INT, April 1, 2010 density (/km²) INT, April 1, 2010 density (/mi²) INT, July 1, 2010 official estimate INT, July 1, 2010 density (/km²) INT, July 1, 2010 density (/mi²) INT, July 1, 2011 official estimate INT, July 1, 2011 density (/km²) INT, July 1, 2011 density (/mi²) INT, Mid-2010 to mid-2011 change (Absolute) INT, Mid-2010 to mid-2011 change (%) VARCHAR, County seat or courthouse VARCHAR)  
SELECT D 50 √ FROM senate_composition_as_a_result_of_the_elections WHERE D 47 √ = r 27 √